ALEXANDER YON HrMBOLBT. ^ 205- of this human knowledge to infinity. covered the great forces of the movement ol bodies, which Copernicus had surmised; and tile- great theory of gravitation which Newton introduced changed physical astronomy into the mechanics of the sky. We do not follow Humboldt in Ms illustrations of the history of the development of astronomy from Galileo to Kepler, and of the mathematical epoch from Newton to Leibnitz, because he has only collected the results of his predecessors In his own manner, and it does not include his own special researches. But with the discoveries of his contemporaries, Humboldt is intimately connected, for he had a direct or indirect share in aU the advances made in natural sciences. Therefore his assistance in the sciences of the heavens and of the earth is gloriously pre-eminent in the greab branches of study on warmth, light, magnetism, and all great forces, whose better explanation is the intel- lectual triumph of the present age. We have thus endeavoured to give another intellec- tual portrait of Humboldt, by a general sketch of Ms "Kosmos," which we have made with all possible fidelity. But the great work is not yet completed; a third and last volume will give us the results of the discoveries on which the present condition of science- is principally founded. And as " Kosmos," the great legacy to the German nationals still incomplete, the life of Humboldt is also incomplete, and we take leave of Mm with the ardent wish that he may yet dwell for many years on this earth, with whose mysteries he is* so familiar, and from which he has culled such abun- dant fruits of knowledge.